Top definition
(adj) an act in which someone thanks someone else far more than is warranted by the action they're thanking about.

etymology: combination of "gratitude" and "gratuitous"
person 1: hey man thanks for that twizzler. i mean it, i really appreciate it. you did me a total solid.

~half an hour later~

person 1: thanks again for that twizzler man, i so owe you one.
person 2: ....well THAT was gratituitous.
by jodyOs April 08, 2011
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