na-adjective
tiny; very small; insignificant
Colloquial adjectival noun describing something as extremely small or trivial, often with a dismissive or emphatic tone.
彼の部屋はちっぽけだけど、居心地がいい。
His room is tiny, but it's cozy.
そんなちっぽけなことで怒らないでよ。
Don't get mad over such a trivial thing.