Define "crutch"

[alexwlchan]

I was reminded of this by Tatiana's tweet about the word "limp"

I don't have time to write a proper definition, but it might be a useful example of a metaphor you should be careful using.

Suggested reading:

• Guest Ableist Word Profile: Crutch by Sasha_feather, with the alternative "training wheels" suggested
• A post from kaberett that suggests "buttress" as another alternative