1 definition by Quinseas, Chane Elí, & Anait

Something unexpected, confusing, out of the ordinary. When a person is expecting one thing and then something else happens.

"Yo, she threw me a f**kin rhombus!"

In this case, said person recognizes that a situation became compromised, and then states loudly that the offender did something out of the ordinary by throwing her an unexpected shape of sorts.
I can't believe she did that to me, she definitely threw me a rhombus!
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