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4.
A living example of inter-species breeding.

One such case currently resides in Canada. While the guesses as to which species it was run close to infinite, most scientists suspect he was conceived during a wild party involving a herd of buffalo and his crack-addicted mother.
Christ, you tankus... They really ruined a perfectly good rectum when they put teeth in your mouth.
by Steven Hayes June 01, 2004
 
1.
It's a cute way of saying thank you.
person #1: Harro, i got you a gift for your birthday
person #2: Tanku ^^
by Fakyou December 21, 2010
 
2.
To be incredibly good at something.
Billy: Did you see Jill run the 100m sprint?
Bob: Yeah, she's so tankus, she beat everyone by like 5 seconds!
by Morganator1224 October 13, 2010
 
3.
Abbreviated and informal version of "thank you" typically used in written communications such as e-mail or SMS text messaging.
Jane: cn u pk up sm apples @ the spmkt?
John: gt em ths mrning
Jane: o, tanku
by zjz April 15, 2008