peek-a-boob 

a nipple that seldom remains concealed by a bra, or any article of clothing, meant to conceal it - usualy occures when an areola is significantly larger than that of the average nipple

"I love when chicks with silver-dollar nipples wear scoop-neck tops... every time they move, there's a PEEK-A-BOOB!"

peek-a-boob by James Goldstein July 2, 2007

Peek-A-Boob 

When half or majority of a boob (perferbly a female's) slips out of clothing by accident

"Man, Stacey's peek-a-boob incident today was so hot."

Peek-A-Boob by Shirtlesssleeves May 11, 2014

peek-a-boob 

A much better alternative to the popular term "nip slip".

Girl 1: OMG, I totally had a nip slip while I was talking to a guy today.

Girl 2: You mean a peek-a-boob?

peek-a-boob by petopher May 26, 2014

Peek-A-Boobing 

When a species of the male origin attempts to discreetly glance at a females breasts. He may do so in a number of ways, using binoculars, his eyeballs, spectacles, poking holes in newspapers, pretending to be looking into your face, using the excuse of "I have lazy eyes, they don't always look where I mean to!" Peek-A-Boobing is also quite often failed, and quite sadly, the female most definitely notices and the fool proceeding with the Peek-A-Boobing ends up doing a boob-tacular stare down.

Terrance: "Hey girl what's up I was just walking in the park today when I saw this cute little puppy being taken away by a huge flying eagle creature-like-thing, and I decided to rescue it."(Tells more of this cocky story, while his eyes slowly shift from the girls eyes to a different pair of her "eyes".
Francine: "Terrance, stop Peek-A-Boobing! I know they are beautiful and you can't help but farther your breast obsession, but I'm not here for a show!"

Terrance: Hangs his head in shame for being caught needing Peek-A-Boobing practice.

Peek-A-Boobing by Copywrited this phrase! August 12, 2011

peekaboob

A view of the female breast where only the areola/nipple is covered. This is usually performed with two or more fingers for each breast. Peekaboob is related to sideboob and underboob because both areas can be seen.

Too many photos in US mens magazines that can't actually show nudity so they resort to peekaboob.

peekaboob by Jon D February 10, 2006

Peekaboob

The opening of a women's poorly designed button-up shirt, between the breasts, that allows anyone from a side angle to catch a peek.

Woman Colleague: "Thanks to our company's poor choice of women's work shirts for this tradeshow, or a lack of understanding that women are curvier than men, I've been inadvertently playing peekaboob all day with customers"

Male Colleague: "Ya, but your sales are up..." (said with an envious tone...)

Peekaboob by Amelkerjewlkrlwgirekrjlekjr November 22, 2017

peekaboob

Like peekaboo, only instead of removing your hands to reveal your face, you pull up/down the shirt to reveal the boobies, then you quickly hide them away again, as in the childhood classic.

NOTE: It is best to play without warning, right in the middle of her telling you something really important.

Anna: Honey, I really want you to know that I-
Henry: PEEKABOOB!!
Anna: God Dammit you are such a typical guy!

peekaboob by Connor McNugget June 14, 2006