Yes, in fact i once did it by mistake.
I supplied higher voltage to an ESP8266 chip than the rated one by mistake, and it jammed most of the nearby WiFi networks.
Your neighbor might be doing it by mistake, maybe you both have a strong WiFi signal on the same channel.
Any WiFi scanner app will help you detect that, this WiFi Analyzer app will even tell the distance between you and the neighbor’s WiFi network, If signal quality of your neighbor’s WiFi network is larger than (-20 dBm) he is most definitely using a WiFi jammer.
