The act of wearing tight pants to make your butt look bigger.
Don: Are your pants painted on or something!?
Liza: No why do you ask!
Don: Looks like you're tryna get that J-Lo Effect gurrrll...
by Rei[: July 21, 2009
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when someone looks younger for their age.
(jennifer lopez is 50, and she looks like she is 30)
person 1: yo, she is really 25? she looks younger!

Person #2: yeah! she looks 16, that's crazy...

Person #1: that's the j. lo effect. she is blessed to have that.

Person #2: I want to look 20 at 30, dawg.
by memelordboi69 March 6, 2020
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