There is no particular sign of beggar or begging in palmistry but if there are too many Rahu Lines (worry lines), criss-cross/zig zag lines all over hand, absent of Fate Line and absent of Sun Line or defected Fate Line and Sun Line (cuts by many horizontal lines, broken, islanded, etc) indicates lack of fortune, debts and hurdles in whole life.
Also if Head Line and Life Line are joined at the beginning and both are very very much defected, this indicates subject born in poor family or severe health problems after birth.