Meaning
When trouble catches you, a child's shirt fits you. In desperate times you will accept help or make do with things you would normally reject as too small or beneath you — hardship humbles a person and makes even the least offering acceptable. 'Chubble' is a pronunciation of 'trouble'.
Examples
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Him too proud fi di likkle job till him get broke; wen chubble kech yuh, pickney shut fit yuh.
He was too proud for the small job until he went broke; hard times make you take what you'd have refused.
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She tek di help now she desperate — wen chubble kech yuh, pickney shut fit yuh.
She took the help now she's desperate — trouble makes even the least offering fit.
-
Beggar cyaa be chooser; wen chubble kech yuh, pickney shut fit yuh.
Beggars can't be choosers; hardship humbles you to accept anything.
Origin
A clothing image: a grown person in real distress will squeeze into a child's shirt that would never normally fit — 'chubble' (trouble) reduces you to accepting whatever you can get.
How it’s used
Said of how desperation humbles people into accepting help or things they would otherwise scorn.