The exact meaning of this phrase eludes explanation. It appears to be a nonsensical, made up phrase that has apparently gained popularity in the 707 Area Code and Milpitas, California.
Loolz. I can make pot smoke with a magnifying glass. On yumps.
by PacaphiliaP November 12, 2011
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Any sex act that involves food.

Yum + Humping
Mossy: Anna, I told you to take this tape back to Blockbuster. Now my perfect renter record is ruined. I always rewind!

Anna: It's 9 1/2 weeks. All the sex scenes are just yumping anyway. I do love a good cucumber myself tho. Jive Turkey
by Justin America May 11, 2023
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1. Usually to strongly agree with what one is saying.
2. To affirm something.
3.Substitution for "yep", "yes",
"yeah", etc.
1. -"Damn those are some big ass tits"
-"YUMP!" (strong usage)
2. -"Check out that ass"
-"Yump" (medium)
3. -"What a bitch"
-"yump" (mild, to simply agree)
by Dirk Moneyshot September 25, 2003
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A small jump often formed by a crest in a road or path of a rally racing special-stage. The term "yump" is believed to have originated from foreign drivers' pronunciation of "jump".
The car's wheels momentarily left the road as it cleared the yump.
by DustyRhodes427 June 30, 2013
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