To drink heavily to the point of getting zonked out of your mind.
Last night I tanked up so much, that I passed out and dreamed that I was swimming in a sea of beer.
ayon kay Mark H ika-17 ng Agosto, 2004
1 more definition
To fill up your car with gas
I gotta stop at a Gas station to tank up
ayon kay Tank up ika-22 ng Nobyembre, 2010