忘餐废寝

see 廢寢忘食|废寝忘食[fei4 qin3 wang4 shi2]

to forget / to overlook / to neglect

to forget one's meals

meal / to eat / classifier for meals

to abolish / to abandon / to abrogate / to discard / to depose / to oust / crippled / abandoned / waste

variant of 廢|废[fei4] / disabled

old variant of 寢|寝[qin3]

to lie down