Do to coke / get high.
Do you wanna blast off this weekend?
by Thomas V May 02, 2006
When a girl is riding a guy cowgirl style. She begins to countdown from 10, and upon reaching 1 she "blasts off", by queefing on his dick as she jumps up into the air.
Jim: So how was your date last night?
Tom: Great, until the end. Took her back to my place, and she decided to blast off. Picture a leaf blower on your nuts.
by blastoffking69 March 07, 2010
Having to take a mighty shit in someone else's toilet in there house, and hoping they don't smell it before you leave.
"After that cup of coffee, I need to blast off in Danya's shitter!"
by Webster March 31, 2003

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