
1) Edging tool 2) Trimming implement
Found on
https://www.crosswordclues.com/clue/rimmer

• (n.) An implement for cutting, trimming, or ornamenting the rim of anything, as the edges of pies, etc.; also, a reamer.
Found on
http://thinkexist.com/dictionary/meaning/rimmer/

Meaning as a surname: The rhymer, poet or singer.
Found on
http://www.encyclo.co.uk/local/20139
Rim'mer noun An implement for cutting, trimming, or ornamenting the rim of anything, as the edges of pies, etc.; also, a reamer.
Knight. Found on
http://www.encyclo.co.uk/webster/R/83
No exact match found.