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When you line up a row of bare-breasted girls - and proceed to lick (and/or nibble) their breasts as you go proceed from left to right (or right to left).

Toppings such as butter, salt - or breast milk - are optional.

It helps if the girls are all relatively the same height.
At the frat party, we dared the girls to line up and take off their tops - so we could all have some titties on a cob.

A 6-3 girl is useless when doing titties on a cob - unless she's got some saggy-ass tits.
by Vocab Jack October 11, 2009
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