(Matthew 13:4 [KJV]) And when he sowed, some seeds fell by the way side, and the fowls came and devoured them up:
Jesus describes in Matthew 13 some people that receive the seed by the way side (verse 4).
(Matthew 13:19 [KJV]) When any one heareth the word of the kingdom, and understandeth it not, then cometh the wicked one, and catcheth away that which was sown in his heart. This is he which received seed by the way side.
Way side people are people that heareth the word of the kingdom and understandeth it not, then cometh the wicked one and catcheth away that which was sown in their heart .
Though they might profess a faith in Jesus Christ. For example people active in church can be lost but have a wife that is saved so they go to church and so they learn the lingo and can profess a faith even though they are unbelievers. If they profess a faith in Jesus Christ and are unbelievers then they are false brethren.
How should we deal with way side people
They are of their father the devil, so resist them just like we are to resist satan.
Submit yourselves therefore to God. Resist the devil, and he will flee from you. — KJV, James 4:7