When driving, swerving is to avoid something, weaving is going in and out of traffic.
What's the difference in swerving and weaving?
I swerved to avoid hitting someone when I'm looking for a garage sale.
I'm weaving in and out when I want to get to that garage sale first. Heck any sale. Especially shoes on sale.
I'll run over you for buy one get one 🆓 😃.