Top Definition
ATTM - adj phrase. awesome to the max (pronounced: "aye-tee-tee-emm").

1. RAD but not quite...but GREAT nonetheless

2. can be used may be used with sarcastically
1. first do0d: hey man, I just got on RetroHelix's RAD list!

second do0d: NO FREAKIN' WAY!, that's ATTM!

first do0d: for sure

2. dude that's ATTM MAN. not!
by RetroHelix January 25, 2006

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