thingy

Short definition from Wiktionary

Noun

1. 1
   A thing (used to refer to something vaguely or when one cannot recall or does not wish to mention its name).
2. 2
   A penis.

Pronoun

1. 1
   A person whose name one cannot recall.
2. 2
   Alternative letter-case form of thingy (“a person whose name one cannot recall”).

Adjective

1. 1
   Resembling or characteristic of a thing; tangible.