You are fucking a guy in the ass and then (out of the blue) you surprise them by pissing in their asshole.
"I didn't expect him to give me a full tank"
by brightangel91 May 24, 2009
FULL TANK is what you get when you want to up size your juice from TANK JUICE BAR.

CRAN: ehyo crosh you gonna get yours FULL TANK?
CROSH: chyea, you gotta get da FULL TANK mayn.
ASTRO: Crosh you must be ballin, you acually have $6.50?
CROSH: no... but actually i do.
CRAN: OMG HAhaHhaahHAH!
by crosh October 30, 2007

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