also: べたぼれ
noun, noun or participle which takes 'suru'
head over heels in love; deeply infatuated
Colloquial and emphatic; describes someone completely smitten, often to the point of being blind to faults. Used as a noun or with する.
彼は彼女にベタ惚れだ。
He is head over heels in love with her.
あの二人、お互いにベタ惚れしてるよね。
Those two are completely smitten with each other, aren't they?