Press your lips together, add vocal cord vibration, then release.

Americans pronounce bow as BOW (/baʊ/). You'll hear it in sentences like "She took a bow as the curtain fell at the end of the play".
Record yourself saying "bow" and play it back. The mic stays on your device — nothing's uploaded.
1 syllable, 2 sounds. Explore each sound's mouth shape and how it's made.