Substituting
/ˈsʌb.stɪ.tjuː.tɪŋ/
Synonyms
- alternating
- exchanging
- replacing
- superseding
- swapping
Slang Meanings
Subbing for someone
I'm just subbing for the regular guy while he's on vacation.
Pulling a switch
I ended up pulling a switch and using my old laptop instead.