Any process that stops or reduces the activity of a phosphoprotein phosphatase.

GO:0034048

GO:0032513

down regulation of phosphoprotein phosphatase activity

down-regulation of phosphoprotein phosphatase activity

downregulation of phosphoprotein phosphatase activity

down regulation of protein phosphatase type 2B activity

down-regulation of protein phosphatase type 2B activity

inhibition of phosphoprotein phosphatase activity

inhibition of calcineurin activity

down-regulation of protein phosphatase type 2A activity

downregulation of calcineurin activity

down regulation of protein phosphatase type 2A activity

negative regulation of protein phosphatase type 2A activity

inhibition of protein phosphatase type 2A activity

down regulation of calcineurin activity

negative regulation of calcineurin activity

negative regulation of protein phosphatase type 2B activity

downregulation of protein phosphatase type 2B activity

downregulation of protein phosphatase type 2A activity

inhibition of protein phosphatase type 2B activity

biological_process

negative regulation of protein phosphatase 2 activity

regulation of protein phosphatase 3 activity

down regulation of protein phosphatase 3 activity

downregulation of protein phosphatase 3 activity

downregulation of protein phosphatase 2 activity

inhibition of protein phosphatase 3 activity

inhibition of protein phosphatase 2 activity

down regulation of protein phosphatase 2 activity

GO:0032515