Collocations for ridiculous - adj.

be, feel, look, seem, sound
become, get
This is getting ridiculous!

really
absolutely, completely, downright, quite, simply, totally, utterly
It's downright ridiculous that the library isn't open on Mondays!

pretty, rather, somewhat
almost
a little, slightly, etc.
faintly
patently
The whole idea was patently ridiculous.

a sense of the ridiculous (esp. BrE)
The whole situation appealed to her sense of the ridiculous.

Ridiculous is used with these nouns:
accusation, argument, charade, claim, costume, excuse, figure, idea, notion, situation, suggestion, thing