A thingamabob, a placeholder word for any unknown or nonspecific object.
Exclamation indicating a successful outcome or sudden realization.
Exclamation acknowledging a witty remark.
Exclamation indicating a successful trick or prank.
A metasyntactic term used for any object whose actual name the speaker does not know or cannot remember; a doodad, gizmo, thingamajig, thingy.