In the beginning of Season 2, Episode 1, the school sign references the unsolved mystery of the Ponytail Murderer from the first season.
Also relating back to Mulaney’s standup, when Nick and Andrew are changing in the locker room, Andrew tells Nick that he could use his oversized jersey as a night shirt.
More of Maury the hormone monster’s tattoos are revealed when he shaves in solidarity with Andrew.
When Jessi and Jay go to the diner, a waitress can be seen carrying blue waffles, which refers to the notoriously-googled and NSFW fake STI.
When Nick’s talking to Gina and Rick, the hormone monster, appears, an ad for Guy Town can be seen in the background.
When Andrew goes to the temple to ask the rabbi for advice on how not to masturbate, the temple is called Temple Beth Amphetamine.
When Nick and Rick are leaving the Friend Zone to go to the Fuck Zone, Rick gets hit by three trucks, two of which have hidden messages.
When Nick and Andrew take Devon and Lola on a double-date, the mini golf place they go to is called Golf Lundgren, which is a twist on Swedish actor Dolph Lundgren‘s name.
They also make references to Lundgren’s movies — like Rocky IV — with the snack specials.
When he’s trying to impress Gina, Nick does his spot-on Coach Steve impression — which is easy since Nick and Coach Steve are both voiced by Nick Kroll.
In a flashback to their first date, Jessi’s dad smokes up Jessi’s mom from his “Matchbox 420” weed box.
When Jessi’s in her basement, you can spot a “The Bowling Dudes” poster which is a nod to The Big Lebowski.
Connie, Jessi’s hormone monster, refers to weed as a “goat cheese omelet,” which then makes subtle appearances throughout the season.
And after Nick calls Andrew “LBW” — “Lola’s Boyfriend…Wow” — this appears on the school sign.
The first of the season’s several Aerosmith references pops up as a Glade plugin at Lola’s condo.
When the Shame Wizard offers Maury drugs at Lola’s condo, he gives him these.
The knickknacks in Missy’s house include this bird-boob bust of Gina and these little figurines — one with large breasts and one with a big penis.
Also on the topic of miscellaneous sexual objects, there’s a recurring Fleshlight throughout Episode 7.
When the Shame Wizard starts DJing the sleepover, the song playing is a remix to The Kroll Show theme song.
Coach Steve tossing his pubes into the air was a nod to Lebron James’ iconic chalk toss.
The writers threw in a couple cultural references in the bathroom graffiti: “Where are the ball hairs?” from American Vandal and “I miss Vine,” which every millennial says.
What’s more, the phone number on the bathroom wall is the home phone number of the Simpsons, and “Eat my sharts” is a nod to Bart Simpson specifically.
Tyler the hormone monster refers to the Shame Wizard as “the floaty guy with the Harry Potter accent,” because the Shame Wizard is voiced by David Thewlis (aka Remus Lupin in Harry Potter and the Deathly Hallows.)
The Ponytail Killer makes a second appearance later in the series when they swerve to avoid Coach Steve and a victim is able to escape.
When Missy’s doing her worm dance, a reference to the scene in Lord of the Flies when Piggy is killed can be seen in the background.
Matthew’s locker has pictures of Ariana Grande, Morrissey, and a copy of The Importance of Being Earnest, which was written by Oscar Wilde, who, like Matthew, was persecuted for being gay and seen as “different.”
When Nick and Andrew go to Maury’s office, you can see a note reminding him to buy Aerosmith tickets in the background, as well as a picture of him inducting Joe Walsh into the Rock & Roll Hall of Fame.
When Jessi and the boys go to the Puberty Headquarters, it’s learned that each of the monsters have their own area of adolescent expertise.
Did we miss any Easter eggs? If so, please tell us in the comments below!