WordNet sense 1 (having little substance or significance):

flimsy, tenuous

WordNet sense 2 (having little physical or spiritual strength):

weak

WordNet sense 3 (being of delicate or slender build):

slender, slim, svelte

WordNet sense 4 (lacking excess flesh):

lean, thin

WordNet sense 5 (a deliberate discourteous act (usually as an expression of anger or disapproval)):

rebuff

WordNet sense 6 (pay no attention to, disrespect):

cold-shoulder