Top Definition
a sexual act in pleasing a woman, using two to three fingers in an upward "come here" motion until the said female does an ejaculation
"that shit totlay works....thats the fucking jeff hammer" -lonnie... and thats how the jeff hammer started...i just told lonnie what i did
by seamonkeyknifefight August 22, 2008
5 Words related to the jeff hammer

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