adjective
1.
not mature, ripe, developed, perfected, etc.

2.
emotionally undeveloped; juvenile; childish.

3.
suitable or designed for young people

4.
young, youthful, or immature
"You want to go to Disneyland? Man, that is so sippy cup..."

"Gonna go take your sippy cup bath? Make sure to bring your baby shampoo"

"I have to go talk to him during his sippy cup cry-fest cause his girl made fun of him."
by pfhorrunner October 7, 2011
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Sippy Cup:
When u succ dick so fuckin hard, but he wont cum
Veronica: Bitch I sippy cupped Carl's dick so fucking hard last night
Emma: there's not much to succ anyways
Veronica: lmao mood
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When you can afford their crappy over priced drinks and bring your own anyway... I ain't paying 12.50 for a pina colada... So, I brought my own sippy cup!
by Camilla Tow August 21, 2014
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This is a secret code name for getting head usually said by the male, who received said action. Suction. Cylindrical Shapes. It's all there for the imagination to see.
Dude, I totally gave my girlfriend my Sippy Cup
High five bruh!
by Seemesipp September 17, 2011
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Juvenile or immature. From the popular children's drinking device 'a sippy cup', made with a covered lid with narrow built-in sipping slot to prevent spillage. Toddlers drink the beverage inside via the narrow slot, and the drink is almost impossible for them to spill because of the cup's design.
"God, look at those girls over there wearing Elmo-t-shirts at the mall. What, are they six or something?"
"Yeah, like that is so sippy cup already."

or

"What was it with rappers all wearing pacifiers and baggy toddler clothes a few years ago?"
"Yeah! Like was that sippy cup, or what?"
by Brandywine September 22, 2006
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Slang for a young girl's vagina. The term is derived from the children's drinking cup. May also be related to the sippy noise of the sippy cup in reference to cunnilingus.
I had a drink from her sippy cup.
by xleninx October 30, 2006
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