1
general::
Phrase(s): *awkward as a cow on a crutch [and] *awkward as a cow on roller skates
very clumsy or off balance. (*Also: as ~.) • When Lulu was overweight, she was awkward as a cow on a crutch. • Tom will never be a gymnast. He’s as awkward as a cow on roller skates!
McGrawhill's American Idioms And Phrasal Verbs