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Orange juice with pulp without the juice
Don't drink that! That's lemonade concentrate! Not lemonade!
Euphemism for the delightful, ambrosial act of excreting; to shit.

See concentration.
"Hold on, I'm going to the bathroom, I need to concentrate."

"Yo, Imma gonna concentrate nigga".
by rony orwell October 10, 2014
to smoke weed before an activity
john: yo man whats up wit you
eric: i just concentrated
by cassay January 24, 2008