Piffle

babil

(nonsense, foolish talk)

bafouillage

(nonsense, foolish talk)

baragouin

(nonsense, foolish talk)

diarrhée verbale

(nonsense, foolish talk)

déconnage

(nonsense, foolish talk)

jargon

(nonsense, foolish talk)

logorrhée

(nonsense, foolish talk)

babiller

(to act or speak in a futile, ineffective, or nonsensical manner)

baragouiner

(to act or speak in a futile, ineffective, or nonsensical manner)

déconner

(to act or speak in a futile, ineffective, or nonsensical manner)

jargonner

(to act or speak in a futile, ineffective, or nonsensical manner)

péter les plombs

(to act or speak in a futile, ineffective, or nonsensical manner)

vaticiner

(to act or speak in a futile, ineffective, or nonsensical manner)